Scarlett (Clare Bowen) and Gunnar (Sam Palladio) may have taken their relationship to the next level when they slept together on Nashville, but Scunnar fans might want to hold off on celebrating. The new couple's honeymoon period may be short-lived, according to Palladio.

That's not entirely surprising, given the fact that the event that immediately preceded their hookup was Gunnar learning that his brother had been murdered. But when Nashville returns from a month-long hiatus Wednesday (10/9c, ABC), there's another source of complications for Scarlett and Gunnar: trying to balance their new romantic relationship with their professional songwriting partnership. It's a classic story of co-ed songwriting duos, and the pair may be headed for a "Fleetwood Mac sort of thing," Palladio admits.